In AC (alternating current) generator, a coil of wire rotates in a magnetic field.
                  
Which of the following would change the potential difference measured by the voltmeter in the system above?
(a) use more turns of wire in the coil.
(b) use thicker wire.
(c) change the speed of rotation.

Choose the correct option from the given ones:
1. (c) only
2. (a), (b) and (c)
3. (a) and (b) only
4. (a) and (c) only
Subtopic:  AC Generator |
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